It's my favorite day of the year-December 31rst- when I do my annual carbon output reckoning.

What I count: planes, trains, automobiles and natural gas home heating.

What I do not count: electricity, as not only is Seattle City Light, powered by 93% renewable wind ,bio-as and hydro-power, but I also have ownership in the Seattle Community Solar program, which kicks back a certain percentage of power-and money-every year.

I also do not count my food choices (though I should) as I have not figured out a way to accurately calculate my food footprint. So far, all the food footprint calculators either over-estimate my meat consumption, or under-estimate it. I realize I should quit meat, and though I have cut way down, I haven't kicked the habit.